256923025 has 6 divisors (see below), whose sum is σ = 318584582. Its totient is φ = 205538400.

The previous prime is 256923001. The next prime is 256923049. The reversal of 256923025 is 520329652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256923001) and next prime (256923049).

It can be written as a sum of positive squares in 3 ways, for example, as 154449 + 256768576 = 393^2 + 16024^2 .

It is a de Polignac number, because none of the positive numbers 2^k-256923025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5138436 + ... + 5138485.

Almost surely, 2^256923025 is an apocalyptic number.

256923025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256923025 is a deficient number, since it is larger than the sum of its proper divisors (61661557).

256923025 is a wasteful number, since it uses less digits than its factorization.

256923025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276931 (or 10276926 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 256923025 is about 16028.8185777992. The cubic root of 256923025 is about 635.7226361015.

The spelling of 256923025 in words is "two hundred fifty-six million, nine hundred twenty-three thousand, twenty-five".